Climate variability in the subarctic area for the last 2 millennia
To put recent climate change in perspective, it is necessary to extend the instrumental climate records with proxy data from paleoclimate archives. Arctic climate variability for the last 2 millennia has been investigated using statistical and signal analyses from three regionally averaged records f...
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ftunivbergen:oai:bora.uib.no:1956/19843 2023-05-15T15:00:45+02:00 Climate variability in the subarctic area for the last 2 millennia Nicolle, Marie Debret, Maxime Massei, Nicolas Colin, Christophe de Vernal, Anne Divine, Dmitry V Werner, Johannes Hormes, Anne Korhola, Atte Linderholm, Hans W. 2019-03-03T17:52:51Z application/pdf https://hdl.handle.net/1956/19843 https://doi.org/10.5194/cp-14-101-2018 eng eng Copernicus Publications under license by EGU urn:issn:1814-9332 urn:issn:1814-9324 https://hdl.handle.net/1956/19843 https://doi.org/10.5194/cp-14-101-2018 cristin:1591217 Attribution CC BY http://creativecommons.org/licenses/by/3.0/ Copyright 2018 The Authors Climate of the Past Peer reviewed Journal article 2019 ftunivbergen https://doi.org/10.5194/cp-14-101-2018 2023-03-14T17:42:32Z To put recent climate change in perspective, it is necessary to extend the instrumental climate records with proxy data from paleoclimate archives. Arctic climate variability for the last 2 millennia has been investigated using statistical and signal analyses from three regionally averaged records from the North Atlantic, Siberia and Alaska based on many types of proxy data archived in the Arctic 2k database v1.1.1. In the North Atlantic and Alaska, the major climatic trend is characterized by long-term cooling interrupted by recent warming that started at the beginning of the 19th century. This cooling is visible in the Siberian region at two sites, warming at the others. The cooling of the Little Ice Age (LIA) was identified from the individual series, but it is characterized by wide-range spatial and temporal expression of climate variability, in contrary to the Medieval Climate Anomaly. The LIA started at the earliest by around AD 1200 and ended at the latest in the middle of the 20th century. The widespread temporal coverage of the LIA did not show regional consistency or particular spatial distribution and did not show a relationship with archive or proxy type either. A focus on the last 2 centuries shows a recent warming characterized by a well-marked warming trend parallel with increasing greenhouse gas emissions. It also shows a multidecadal variability likely due to natural processes acting on the internal climate system on a regional scale. A ∼ 16–30-year cycle is found in Alaska and seems to be linked to the Pacific Decadal Oscillation, whereas ∼ 20–30- and ∼ 50–90-year periodicities characterize the North Atlantic climate variability, likely in relation with the Atlantic Multidecadal Oscillation. These regional features are probably linked to the sea ice cover fluctuations through ice–temperature positive feedback. publishedVersion Article in Journal/Newspaper Arctic Climate change North Atlantic Sea ice Subarctic Alaska Siberia University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Pacific Climate of the Past 14 1 101 116 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
To put recent climate change in perspective, it is necessary to extend the instrumental climate records with proxy data from paleoclimate archives. Arctic climate variability for the last 2 millennia has been investigated using statistical and signal analyses from three regionally averaged records from the North Atlantic, Siberia and Alaska based on many types of proxy data archived in the Arctic 2k database v1.1.1. In the North Atlantic and Alaska, the major climatic trend is characterized by long-term cooling interrupted by recent warming that started at the beginning of the 19th century. This cooling is visible in the Siberian region at two sites, warming at the others. The cooling of the Little Ice Age (LIA) was identified from the individual series, but it is characterized by wide-range spatial and temporal expression of climate variability, in contrary to the Medieval Climate Anomaly. The LIA started at the earliest by around AD 1200 and ended at the latest in the middle of the 20th century. The widespread temporal coverage of the LIA did not show regional consistency or particular spatial distribution and did not show a relationship with archive or proxy type either. A focus on the last 2 centuries shows a recent warming characterized by a well-marked warming trend parallel with increasing greenhouse gas emissions. It also shows a multidecadal variability likely due to natural processes acting on the internal climate system on a regional scale. A ∼ 16–30-year cycle is found in Alaska and seems to be linked to the Pacific Decadal Oscillation, whereas ∼ 20–30- and ∼ 50–90-year periodicities characterize the North Atlantic climate variability, likely in relation with the Atlantic Multidecadal Oscillation. These regional features are probably linked to the sea ice cover fluctuations through ice–temperature positive feedback. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Nicolle, Marie Debret, Maxime Massei, Nicolas Colin, Christophe de Vernal, Anne Divine, Dmitry V Werner, Johannes Hormes, Anne Korhola, Atte Linderholm, Hans W. |
spellingShingle |
Nicolle, Marie Debret, Maxime Massei, Nicolas Colin, Christophe de Vernal, Anne Divine, Dmitry V Werner, Johannes Hormes, Anne Korhola, Atte Linderholm, Hans W. Climate variability in the subarctic area for the last 2 millennia |
author_facet |
Nicolle, Marie Debret, Maxime Massei, Nicolas Colin, Christophe de Vernal, Anne Divine, Dmitry V Werner, Johannes Hormes, Anne Korhola, Atte Linderholm, Hans W. |
author_sort |
Nicolle, Marie |
title |
Climate variability in the subarctic area for the last 2 millennia |
title_short |
Climate variability in the subarctic area for the last 2 millennia |
title_full |
Climate variability in the subarctic area for the last 2 millennia |
title_fullStr |
Climate variability in the subarctic area for the last 2 millennia |
title_full_unstemmed |
Climate variability in the subarctic area for the last 2 millennia |
title_sort |
climate variability in the subarctic area for the last 2 millennia |
publisher |
Copernicus Publications under license by EGU |
publishDate |
2019 |
url |
https://hdl.handle.net/1956/19843 https://doi.org/10.5194/cp-14-101-2018 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Climate change North Atlantic Sea ice Subarctic Alaska Siberia |
genre_facet |
Arctic Climate change North Atlantic Sea ice Subarctic Alaska Siberia |
op_source |
Climate of the Past |
op_relation |
urn:issn:1814-9332 urn:issn:1814-9324 https://hdl.handle.net/1956/19843 https://doi.org/10.5194/cp-14-101-2018 cristin:1591217 |
op_rights |
Attribution CC BY http://creativecommons.org/licenses/by/3.0/ Copyright 2018 The Authors |
op_doi |
https://doi.org/10.5194/cp-14-101-2018 |
container_title |
Climate of the Past |
container_volume |
14 |
container_issue |
1 |
container_start_page |
101 |
op_container_end_page |
116 |
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1766332821524185088 |